Vascular access systems having a guidewire anti-migration feature

Abstract

Disclosed herein is a removable cap for connection to an input port of a catheter, comprising a proximal end having a lumen configured to house a guidewire therethrough; a distal end configured to reversibly mate with a luer lock of the input port of a catheter, the distal end having a lumen configured to house the guidewire therethrough; and a tubular body between the proximal end and the distal end, wherein the tubular body comprises an anti-migration feature transformable between a first configuration to allow slidable movement of the guidewire within the cap in a first direction toward the patient, and a second configuration to prevent slidable movement of the guidewire within the cap in the first direction toward the patient. Systems and methods are also disclosed.

What is claimed is: 
     
         1 . A removable cap for connection to an input port of a catheter, comprising:
 a proximal end having a lumen configured to house a guidewire therethrough;   a distal end configured to reversibly mate with a luer lock of the input port of a catheter, the distal end having a lumen configured to house the guidewire therethrough; and   a tubular body between the proximal end and the distal end,   wherein the tubular body comprises an anti-migration feature transformable between a first configuration to allow slidable movement of the guidewire within the cap in a first direction toward the patient, and a second configuration to prevent slidable movement of the guidewire within the cap in the first direction toward the patient.   
     
     
         2 . The removable cap of  claim 1 , wherein the second configuration of the anti-migration feature allows slidable movement of the guidewire within the cap in a second direction opposite the first direction. 
     
     
         3 . The removable cap of  claim 1 , wherein the anti-migration feature comprises a spring-loaded element. 
     
     
         4 . The removable cap of  claim 3 , further comprising a plurality of arms configured to transmit a radial inward force to the guidewire when a force is applied on the arms by the spring-loaded element. 
     
     
         5 . The removable cap of  claim 1 , wherein the tubular body comprises a movable wall transformable from a first radially compressed configuration for preventing axial movement of the guidewire and a second radially enlarged configuration for allowing axial movement of the guidewire. 
     
     
         6 . The removable cap of  claim 1 , wherein the anti-migration feature comprises a threaded wingnut. 
     
     
         7 . The removable cap of  claim 1 , wherein the anti-migration feature comprises a zone of the lumen having a tapered sidewall and a plurality of beads operably connected to the sidewall, the beads selectively exerting a radially compressive force on the guidewire when the guidewire moves in the first direction. 
     
     
         8 . A catheter system comprising: a catheter, a guidewire, and the removable cap of  claim 1 .